Where can I find a 3D Elevation Program (3DEP) DEM status map and get information on recent updates?

Status maps showing 3DEP product availability and recent updates can be found on the 3DEP Product Availability web page.

Areas containing recent updates are refreshed on a monthly basis. Spatial metadata shapefiles showing the updated areas for each product are also available for download from the 3DEP Product Metadata web page.

Product updates can be acquired through The National Map Download Client or through a bulk data request (see here for information on bulk data delivery).

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Are 3D Elevation Program (3DEP) contour lines updated and what sources were used to create them?

When significant changes in the landscape have occurred, contours will be updated on an as-needed basis. The 100-foot contours were derived from 3DEP (formerly National Elevation Dataset) one arc-second resolution data, which was sub-sampled to a cell size of three arc-second. The 50-foot contours were also derived from one arc-second data. Large...

Is there a difference between 3D Elevation Program (3DEP) DEM data and lidar data?

Yes, lidar data are represented as a cloud of variably spaced point locations (x,y,z) of any terrestrial target reflecting the laser pulse. In addition to bare-earth, the point cloud will typically include buildings, trees, towers, and powerlines. 3DEP DEMs are raster surfaces of bare-earth elevation values sampled at uniform horizontal increments...

How can I download 3D Elevation Program (3DEP) standard DEM data in bulk?

1. To request bulk elevation data, please email tnminfo@usgs.gov and provide the following: Your contact information (address, phone number, and email address). Product(s) you are requesting. Requested data format(s). 2. An email will be sent to you containing the following information: Job ID Number. Size estimates for requested data. External...

How can a user get 3DEP product updates?

Graphics showing 3DEP product availability and recent updates can be found on the 3DEP Product Availability Web page. Areas containing recent updates are refreshed monthly. Spatial metadata shapefiles showing the updated areas for each product are also available for download from the 3DEP Product Metadata Web page. Product updates can be acquired...

Why don't the elevations on your maps agree with those provided by my GPS system? Which ones are correct?

They both might be correct. The reason that the elevations do not agree might be because they are set on different datums. Most maps use NAD27 and the elevations are based on mean sea level. Your GPS receiver uses WGS84 and the elevations are based on the NAD83 ellipsoid. These datum shifts can result in difference of tens of meters horizontal and...
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Date published: February 7, 2019

USGS 3DEP Lidar Point Cloud Now Available as Amazon Public Dataset

The USGS 3D Elevation Program (3DEP) is excited to announce the availability of a new way to access and process lidar point cloud data from the 3DEP repository.

Date published: October 30, 2018

USGS Topo Base Map Refreshed and Other Updates

The “USGS Topo Base Map” service named “USGS Topo” has been refreshed with new data and design changes. In addition, several of the “Data Availability”, or “Data Index” services have new cloud hosted URLs.

Date published: May 23, 2018

Keeping Current with Map Services Made Easier

The National Map provides a new Simple Notification Service and has new URLs for some of its thematic cartographic map services.

Filter Total Items: 5
November 7, 2018

3D model of Pu‘u ‘Ō‘ō's crater

This 3D model of Pu‘u ‘Ō‘ō's crater was created from thermal images during an overflight of the cone. The deepest portion of the crater is about 320 meters (1050 feet) below the crater floor that existed prior to April 30.

November 30, 2017

Majuro Atoll — Topobathymetric Model

This video is of is a three-dimensional (3D) view of the Majuro Atoll, Republic of the Marshall Islands topobathymetric model which consists of topography (land elevation) and bathymetry (water depth). This video shows the importance of high-resolution, detailed topobathymetric models because the highest natural elevation for the Majuro Atoll is only three meters. This

3D Lidar Point Cloud Image of San Francisco Bay and Golden Gate Bridge
April 18, 2016

3D Lidar Point Cloud Image of San Francisco Bay and Golden Gate Bridge

3D Lidar Point Cloud Image of San Francisco Bay and Golden Gate Bridge in California

video thumbnail: Using bare-earth LiDAR imagery to reveal the Tahoe - Sierra frontal fault zone Lake Tahoe, California.
September 29, 2008

Using bare-earth LiDAR imagery to reveal the Tahoe - Sierra frontal fault zone Lake Tahoe, California.

This video provides a visual example of how airborne LiDAR (Light D
etection And Ranging) imagery penetrates dense forest cover to reveal
an active fault line not detectable with conventional aerial
photography. The video shows an aerial perspective of the range front
Mt. Tallac fault, which is one of five active faults that traverse

Attribution: Natural Hazards
Image: Cartographers in the Field
January 1, 2007

Cartographers in the Field

This Depression-era oil painting was created by USGS field man Hal Shelton in 1940. The painting depicts mapping techniques used in the early days of cartography, including an alidade and stadia rod for determining distances and elevations and a plane-table for sketching contour lines. A USGS benchmark is visible near the top. The straight white lines represent survey

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